Im pretty sure its impossible... you can get friends into a cagematch but thats timing not glitching.

um, just do cage matches with your friend. takes a while but works

Join a cage match i'm 99.9% sure they'll say... "Headshots?" or their tag will be sumthing like "H&S?" so you trade shooting each other in the head in the center of the level. ranking up your guns.
"word to the wise do it legit"
its not that hard, and once you are; 55 prestige 10, all gold guns, all challenges.
what will you have? wasted time shooting your friends head?
or memories/vids to post of you owning someone?
"It's your call..."

ya just do a cage match it ranks you up quicker and you will be able to get to pristega fast i went from first pristega level 21 to the next pristega level 6 and now i am at 3 pristega and at level 25 and my PSN name is my234

and you can get gold guns so much faster

except unless your a total noob your kill death ratio will go way down

Or just buy a file that has them.. or earn it.

justdo cagematch, mostly they got "HSx3" as clan tag (headshotsx3) so u make 3 headies, he makes 3 headies, u makes 3 headies, he...

dude my234 ur on my friends list lol doing that shit i did it for 1 hour like a lame **** and i was at 1.83 k/d ratio and it brought me down to 1.34 took me 2 days of playing to get it back up waste of time when u can just keep playing stay at aprestige u wanna stay at with a cool rank look and just earn it the hard way golden guns means nothing if u do cage to do it ur worthless and everyone will know well have fun man do what u want but warning u u will suck